I will advice you to get a sterlings bankers draft. Do you know any GT-bank branch at Nkawkaw. gt-bank does international bankers draft in dollars and sterlings .
This is their directives on foreign banking draft.
Foreign Currency Draft Issuance
A draft is a written order by a Bank irrevocably undertaking to pay on demand a specified sum of money to the order of a specified person. Presently our foreign currency drafts are drawn on Citibank New York for US Dollar drafts and Citibank London for Pound Sterling and Euro drafts.
A funded foreign currency account in the currency of the draft required OR
A draft can be issued from a Cedi account but requires additional documents in accordance with Bank Of Ghana foreign exchange regulations.
A properly written and duly signed customer instruction
Foreign currency drafts from all of our branches are processed at the Head Office and forwarded to the branches after processing.